Adhesive sheet for artificial nail

ABSTRACT

An adhesive sheet for an artificial nail comprises a releasable protective film having, at a tip end side of a bare nail to which a double-sided adhesive sheet member is attached, a peeling tongue piece having a width smaller than the width of the double-sided adhesive sheet member and projecting outward from the double-sided adhesive sheet member, wherein the double-sided adhesive sheet member and the releasable protective film are chamfered in a convex R shape from a base end of the peeling tongue piece toward both sides in a width direction.

FIELD OF THE INVENTION

The present invention relates to an adhesive sheet for an artificialnail that allows easy mounting of an artificial nail on a bare nail.

BACKGROUND ART

Nowadays women apply nail art on their bare nails or attach artificialnails to their bare nails to create a stylish look.

For a method for attaching an artificial nail to a bare nail, there isan attachment method using glue or double-sided adhesive tape as shownin Japanese Publication No. 2002-17433.

In a method for attaching an artificial nail using glue, the artificialnail needs to be pressed until the glue is cured, and thus, attachmenttakes time. In addition, when the artificial nail is removed, the glueneeds to be dissolved by allowing a chemical agent or a nail polishremover to be soaked between the artificial nail and the bare nail, andthus, it takes time.

On the other hand, in a method for attaching an artificial nail usingdouble-sided adhesive tape, a release sheet of one adhesive side of thedouble-sided adhesive tape is removed and the one adhesive side isattached to a bare nail, and thereafter, a release sheet of the otheradhesive side is removed and an artificial nail is attached to theexposed other adhesive side. Therefore, attachment and removal of anartificial nail can be done in a shorter time as compared with the caseof using glue. However, upon removing the release sheet, a fingertip maytouch part of the adhesive layer, causing the fingertip to be attachedto the adhesive side; accordingly, a problem arises in that there isdifficulty in successfully attaching a double-sided adhesive tape to abare nail.

In view of the foregoing problems, an object of the present invention isto provide an adhesive sheet for an artificial nail that allows easymounting of an artificial nail on a bare nail.

SUMMARY OF THE INVENTION

To attain the aforementioned object, an adhesive sheet for an artificialnail of the present invention has at least one double-sided adhesivesheet member formed in a substantially nail shape that is laminated on arelease board with an adhesive side thereof facing the release board;and a releasable protective film laminated on the other side of thedouble-sided adhesive sheet member, in which an adhesive layer and thereleasable protective film are peeled off from the release board and theside of the double-sided adhesive sheet member that is on a releaseboard side is attached to a surface of a bare nail, and thereafter, thereleasable protective film is removed from the double-sided adhesivesheet member and an artificial nail is attached to the exposed side ofthe double-sided adhesive sheet member that is on a releasableprotective film side. In the adhesive sheet for an artificial nail, thereleasable protective film has a peeling tongue piece having a widthsmaller than a width of the double-sided adhesive sheet member andprojecting outward from the double-sided adhesive sheet member, and thedouble-sided adhesive sheet member and the releasable protective filmare chamfered in a convex R shape from a base end of the peeling tonguepiece toward both sides in a width direction.

It is preferred that the width of the peeling tongue piece be as smallas possible, as long as the peeling tongue piece is not torn when peeledoff. The width of the peeling tongue piece is preferably about 15percent to 35 percent of the maximum width of the double-sided adhesivesheet member.

The length of the peeling tongue piece is not particularly limited aslong as the length is long enough for fingertips to hold the peelingtongue piece, however, it is preferably about 2 millimeters to 4millimeters.

As described above, since a releasable protective film has a peelingtongue piece, a double-sided adhesive sheet member together with thereleasable protective film is peeled off from a release board, anexposed side of the double-sided adhesive sheet member is mounted on abare nail, and then, the peeling tongue piece is held by fingertips orthe like and the releasable protective film is peeled off from thedouble-sided adhesive sheet member. By this, without the double-sidedadhesive sheet member being attached to a fingertip or the like, anadhesive layer can be beautifully attached to the surface of the barenail.

Moreover, since the peeling tongue piece is provided to project outwardfrom the double-sided adhesive sheet member, when, for example, thereleasable protective film and the double-sided adhesive sheet memberare mounted on the bare nail, the peeling tongue piece can be easilyheld by fingertips or the like.

Furthermore, since the double-sided adhesive sheet member and thereleasable protective film are chamfered at both sides of the width in aconvex R shape from a base end of the peeling tongue piece toward thepeeling tongue piece, by aligning an R portion of the double-sidedadhesive sheet member with an R portion of a base end or tip end of thebare nail, the double-sided adhesive sheet member can be attached to thebare nail with as little clearance as possible on the bare nail.Accordingly, an artificial nail can be securely attached and fixed tothe surface of the bare nail.

Further, In the adhesive sheet for an artificial nail of the presentinvention, the releasable protective film has a release layer made of asilicone-coated paper and a reinforcing layer that reinforces therelease layer.

A material that forms the reinforcing layer is not particularly limited.Examples of the material include a polyethylene film and a polyethyleneterephthalate (PET) film.

A material that forms the double-sided adhesive sheet member is notparticularly limited. Examples of the material include an acrylic resinadhesive and one obtained by impregnating or coating a base materialmade of a nonwoven fabric cloth, for example, with an adhesive. Amaterial formed solely from an acrylic resin adhesive is preferable.Above all, a material having an extensibility that allows it to beextended by about 1.3 times to 2 times (more preferably approximately1.5 times) when the material being attached to the surface of the barenail is pressed by a finger from the artificial nail side.

In favour of the structure, the width of the peeling tongue piece can bemade small. In addition, when the double-sided adhesive sheet member andthe releasable protective film are formed by a punching process using aThomson, unnecessary portions canbe easily removed. That is, althoughthe releasable protective film can be formed solely of a PET film or apolyvinyl chloride film, for example, when the releasable protectivefilm is formed solely of a PET film, a polyvinyl chloride film, or thelike, a sufficient strength can be obtained without additionallyproviding a reinforcing layer; however, unnecessary portions may not besuccessfully removed upon performing a punching process. Hence, asdescribed above, by using, as a release layer, a silicone-coated paperthat is softer than a PET film or a polyvinyl chloride film, unnecessaryportions can be successfully removed.

Further, in the adhesive sheet for an artificial nail of the presentinvention, a plurality of the double-sided adhesive sheet members havingdifferent sizes are laminated on the release board.

In favour of the structure, an adhesive layer of a size that matches thesize of a bare nail can be selected and an artificial nail can besecurely and properly attached and fixed.

Further, in the adhesive sheet of the present invention, a releasabilityof the releasable protective film with respect to the double-sidedadhesive sheet member is more inferior than a releasability of therelease board with respect to the double-sided adhesive sheet member.

In favour of the structure, by holding the peeling tongue piece by thefingertips and attempting to peel off the double-sided adhesive sheetmember from the release board, the double-sided adhesive sheet member isreliably removed from the release board with the double-sided adhesivesheet member being attached to the releasable protective film side.Accordingly, peeling off from the release board can be easily done.

Further, in the adhesive sheet for an artificial nail of the presentinvention, the double-sided adhesive sheet member and the releasableprotective film are chamfered in a convex R shape at their respectiveend edges opposite a location where the peeling tongue piece is formed,from a center in a width direction thereof toward both sides in thewidth direction.

In favour of the structure, by aligning the R portion of thedouble-sided adhesive sheet member with an R portion of an end of thebare nail, the double-sided adhesive sheet member can be attached to thebare nail with as little clearance as possible at the end of the barenail, and accordingly, an artificial nail can be securely attached andfixed to the surface of the bare nail.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view showing one embodiment of an adhesive sheet forartificial nails, according to the present invention;

FIG. 2 is a cross-sectional view taken along line X-X of FIG. 1;

FIG. 3 is a partially cutaway plan view explaining a method forproducing the adhesive sheet for artificial nails of FIG. 1 and showinga state before punching using a Thomson;

FIG. 4 is a partial plan view explaining the method for producing theadhesive sheet for artificial nails of FIG. 1 and showing a state afterpunching using a Thomson and before removal of a punched portion;

FIG. 5 is a diagram explaining step by step a method for using theadhesive sheet for artificial nails of FIG. 1;

FIG. 6 is an illustrative diagram showing an exemplary attachment of theadhesive sheet for artificial nails to a bare nail;

FIG. 7 is an illustrative diagram showing another exemplary attachmentof the adhesive sheet for artificial nails to a bare nail; and

FIG. 8 is an illustrative diagram showing an exemplary attachment of theadhesive sheet for artificial nails to an artificial nail.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention will be explained in detail below with referenceto the drawings that represent an embodiment of the invention.

FIG. 1 and FIG. 2 show one embodiment of an adhesive sheet for anartificial nail according to the present invention.

As shown in FIG. 1 and FIG. 2, in an adhesive sheet 1 for artificialnails, seven pairs of double-sided adhesive sheet members 3 a to 3 ghaving different sizes are attached to a release side of a release board2 with one side thereof facing the release side and with a predeterminedspace provided therebetween. Releasable protective films 4 a to 4 g areattached to the double-sided adhesive sheet members 3 a to 3 g,respectively, with a release side thereof facing the other side of thedouble-sided adhesive sheet members 3 a to 3 g.

In the releasable protective films 4 a to 4 g, a release layer 41 madeof a silicone-coated paper and serving as a release side and areinforcing layer 42 made of a polyethylene film and reinforcing therelease layer 41 are laminated on top of each other. The double-sidedadhesive sheet members 3 a to 3 g each have, at the center of a tip endthereof, a peeling tongue piece having a width smaller than the width ofthe double-sided adhesive sheet members 3 a to 3 g and projectingoutward from the double-sided adhesive sheet members 3 a to 3 g.

The double-sided adhesive sheet members 3 a to 3 g and the releasableprotective films 4 a to 4 g are chamfered, as shown in FIG. 1, in aconvex R shape from a base end of their corresponding peeling tonguepieces 43 toward both sides in a width direction. The double-sidedadhesive sheet members 3 c to 3 g and the releasable protective films 4c to 4 g are chamfered, as shown in FIG. 1, in a convex R shape at theirrespective end edges opposite the location where the peeling tonguepieces 43 are formed, toward both sides in the width direction.

The releasability of the releasable protective films 4 a to 4 g withrespect to the double-sided adhesive sheet members 3 a to 3 g is moreinferior than the releasability of the release board 2 with respect tothe double-sided adhesive sheet members 3 a to 3 g.

The double-sided adhesive sheet members 3 a to 3 g are formed of anacrylic resin adhesive having an extensibility that allows the area tobe increased by approximately 1.5 times when pressed by a finger.

The adhesive sheet 1 for artificial nails can be produced as follows.

Specifically, first, as shown in FIG. 3, an adhesive which serves asdouble-sided adhesive sheet members 3 a to 3 g is applied to a releaseside of a first release sheet 5 which serves as a release board, to apredetermined pitch and thickness to form sheet-like adhesive layers 6.

Subsequently, a second release sheet 7 which serves as releasableprotective films 4 a to 4 g is attached to top surfaces of thesheet-like adhesive layers 6 with a release side thereof facing thesheet-like adhesive layers 6.

Then, as indicated by dash-dot-dot lines in FIG. 4 (in FIG. 4, onlyportions of 4 f and 4 g are shown), using a Thomson (not shown), thesecond release sheet 7 and the sheet-like adhesive layer 6 are punchedto form peeling tongue pieces 43 in a portion starting from an end edgeof the sheet-like adhesive layer 6 to where the sheet-like adhesivelayer 6 is not provided. Then, the outer regions are removed from thefirst release sheet 5 and the first release sheet 5 is cut out in theform of a release board.

The adhesive sheet 1 for artificial nails is composed as describedabove, and allows an artificial nail 8 to be attached to a bare nail 9in the manner shown in FIG. 5.

Specifically, first, as shown in FIG. 5A, a peeling tongue piece 43 of acorresponding one of releasable protective films 4 a to 4 g attached toa top surface of a double-sided adhesive sheet member 3 a (3 b to 3 g)that matches the width of the bare nail 9 is held by the fingertips, andthe releasable protective film 4 a (4 b to 4 g) and the double-sidedadhesive sheet member 3 a (3 b to 3 g) are peeled off from a releaseboard 2. Then, a side of the double-sided adhesive sheet member 3 a (3 bto 3 g) that is on the side of the release board 2 is attached to thebare nail 9.

Then, as shown in FIG. 5B, with the peeling tongue piece 43 being heldby the fingertips, the releasable protective film 4 a (4 b to 4 g) ispeeled off from the double-sided adhesive sheet member 3 a (3 b to 3 g).

As shown in FIG. 5C, the artificial nail 8 is attached to the exposedother side of the double-sided adhesive sheet member 3 a (3 b to 3 g).Upon attaching the artificial nail 8, it is preferred that theartificial nail 8 be pressed by a fingertip from the top to extend thedouble-sided adhesive sheet member 3 a such that the double-sidedadhesive sheet member 3 a and the bare nail 9 are sufficiently andclosely attached to each other.

Note that upon attaching the side of the double-sided adhesive sheetmember 3 a (3 b to 3 g) that is on the side of the release board 2 tothe bare nail 9, as shown in FIG. 6, the peeling tongue piece 43 may bepositioned at an outward tip end of the bare nail 9, or, as shown inFIG. 7, the peeling tongue piece 43 may be positioned at an outward baseend of the bare nail 9.

In the above-described adhesive sheet for attaching artificial nails,the double-sided adhesive sheet member 3 a (3 b to 3 g) together with apeeling paper may be removed from the peeling board 2, and as shown inFIG. 8, the double-sided adhesive sheet member 3 a (3 b to 3 g) may bemounted on a backside of an artificial nail and the peeling paper may bepeeled off from the double-sided adhesive sheet member 3 a (3 b to 3 g)to allow a surface of the double-sided adhesive sheet member 3 a (3 b to3 g) to be exposed. Thereafter, the artificial nail may be placed on thebare nail 9 of the finger, whereby the artificial nail may be bonded andfixed to the bare nail 9 of the finger via the double-sided sheet member3 a (3 b to 3 g).

The adhesive sheet for artificial nails according to the presentinvention is not limited to the aforementioned embodiment. For example,although in the aforementioned embodiment a plurality of double-sidedadhesive sheet members having different sizes are attached to a releaseboard, the double-sided adhesive sheet members may all have the samesize.

Although in the aforementioned embodiment a releasable protective filmis formed of a release layer and a reinforcing layer that are laminatedon top of each other, the reinforcing layer does not need to beprovided, as long as a peeling tongue piece is not torn when peeled off.

1. An adhesive sheet for an artificial nail having at least onedouble-sided adhesive sheet member formed in a substantially nail shapethat is laminated on a release board with an adhesive side thereoffacing the release board; and a releasable protective film laminated onother side of the double-sided adhesive sheet member, in which anadhesive layer and the releasable protective film are peeled off fromthe release board and the side of the double-sided adhesive sheet memberthat is on a release board side is attached to a surface of a bare nail,and thereafter, the releasable protective film is removed from thedouble-sided adhesive sheet member and an artificial nail is attached tothe exposed side of the double-sided adhesive sheet member that is on areleasable protective film side, wherein the releasable protective filmhas a peeling tongue piece having a width smaller than a width of thedouble-sided adhesive sheet member and projecting outward from thedouble-sided adhesive sheet member, and the double-sided adhesive sheetmember and the releasable protective film are chamfered in a convex Rshape from a base end of the peeling tongue piece toward both sides in awidth direction.
 2. The adhesive sheet for an artificial nail accordingto claim 1, wherein the releasable protective film has a release layermade of a silicone-coated paper and a reinforcing layer that reinforcesthe release layer.
 3. The adhesive sheet for an artificial nailaccording to claim 1, wherein a plurality of the double-sided adhesivesheet members having different sizes are laminated on the release board.4. The adhesive sheet for an artificial nail according to claim 1,wherein a releasability of the releasable protective film with respectto the double-sided adhesive sheet member is more inferior than areleasability of the release board with respect to the double-sidedadhesive sheet member.
 5. The adhesive sheet for an artificial nailaccording to claim 1, wherein the double-sided adhesive sheet member andthe releasable protective film are chamfered in a convex R shape attheir respective end edges opposite a location where the peeling tonguepiece is formed, from a center in a width direction thereof toward bothsides in the width direction.
 6. The adhesive sheet for an artificialnail according to claim 2, wherein a plurality of the double-sidedadhesive sheet members having different sizes are laminated on therelease board.
 7. The adhesive sheet for an artificial nail according toclaim 2, wherein a releasability of the releasable protective film withrespect to the double-sided adhesive sheet member is more inferior thana releasability of the release board with respect to the double-sidedadhesive sheet member.
 8. The adhesive sheet for an artificial nailaccording to claim 3, wherein a releasability of the releasableprotective film with respect to the double-sided adhesive sheet memberis more inferior than a releasability of the release board with respectto the double-sided adhesive sheet member.
 9. The adhesive sheet for anartificial nail according to claim 6, wherein a releasability of thereleasable protective film with respect to the double-sided adhesivesheet member is more inferior than a releasability of the release boardwith respect to the double-sided adhesive sheet member.
 10. The adhesivesheet for an artificial nail according to claim 2, wherein thedouble-sided adhesive sheet member and the releasable protective filmare chamfered in a convex R shape at their respective end edges oppositea location where the peeling tongue piece is formed, from a center in awidth direction thereof toward both sides in the width direction. 11.The adhesive sheet for an artificial nail according to claim 3, whereinthe double-sided adhesive sheet member and the releasable protectivefilm are chamfered in a convex R shape at their respective end edgesopposite a location where the peeling tongue piece is formed, from acenter in a width direction thereof toward both sides in the widthdirection.
 12. The adhesive sheet for an artificial nail according toclaim 4, wherein the double-sided adhesive sheet member and thereleasable protective film are chamfered in a convex R shape at theirrespective end edges opposite a location where the peeling tongue pieceis formed, from a center in a width direction thereof toward both sidesin the width direction.
 13. The adhesive sheet for an artificial nailaccording to claim 6, wherein the double-sided adhesive sheet member andthe releasable protective film are chamfered in a convex R shape attheir respective end edges opposite a location where the peeling tonguepiece is formed, from a center in a width direction thereof toward bothsides in the width direction.
 14. The adhesive sheet for an artificialnail according to claim 7, wherein the double-sided adhesive sheetmember and the releasable protective film are chamfered in a convex Rshape at their respective end edges opposite a location where thepeeling tongue piece is formed, from a center in a width directionthereof toward both sides in the width direction.
 15. The adhesive sheetfor an artificial nail according to claim 8, wherein the double-sidedadhesive sheet member and the releasable protective film are chamferedin a convex R shape at their respective end edges opposite a locationwhere the peeling tongue piece is formed, from a center in a widthdirection thereof toward both sides in the width direction.
 16. Theadhesive sheet for an artificial nail according to claim 9, wherein thedouble-sided adhesive sheet member and the releasable protective filmare chamfered in a convex R shape at their respective end edges oppositea location where the peeling tongue piece is formed, from a center in awidth direction thereof toward both sides in the width direction.